철저하다

to be thorough, exhaustive

Principal parts

관형사형Modifier
철저한
아/어Infinitive
철저해
-으니Since
철저하니
합니다Formal
철저합니다

Present

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 철저해요철저합니다철저해철저하다

Past

해요체Polite합니다체Formal해체Casual한다체Plain
서술Statement 철저했어요철저했습니다철저했어철저했다

Future & presumptive

해요체Polite합니다체Formal해체Casual한다체Plain
-겠-Will / must be 철저하겠어요철저하겠습니다철저하겠어철저하겠다
-을 것이다Going to 철저할 거예요철저할 것입니다철저할 거야철저할 것이다

Questions

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 철저해요?철저합니까?철저해?철저하니?
과거Past 철저했어요?철저했습니까?철저했어?철저했니?

Negation

해요체Polite합니다체Formal해체Casual한다체Plain
안Not (short) 안 철저해요안 철저합니다안 철저해안 철저하다
-지 않다Not (long) 철저하지 않아요철저하지 않습니다철저하지 않아철저하지 않다

Honorific

해요체Polite합니다체Formal해체Casual한다체Plain
현재Present 철저하세요철저하십니다철저하셔철저하시다
과거Past 철저하셨어요철저하셨습니다철저하셨어철저하셨다

Modifying a noun

현재Present
철저한
과거Past
철저한
미래Future
철저할
회상Used to
철저하던

Joining clauses

-고and
철저하고
-게-ly / so that
철저하게
-어서so / and then
철저해서
-으니까since
철저하니까
-으면if / when
철저하면
-지만but
철저하지만
-는데and / but (setting up)
철저한데
-어도even if
철저해도

Sentence patterns

In real sentences

돈 관리에 철저하셨죠.

She was a good money manager.

그만큼 철저하다는 거겠지

That's good. It means they're being thorough.

제가 아주 철저한 검사를 할 수 있었던 것입니다

I could do an extraordinarily thorough exam.

데카르트와 스피노자와는 달리, 라이프니츠는 대학에서 철저한 철학 교육을 받았다.

Unlike Descartes and Spinoza, Leibniz had a thorough university education in philosophy.

Common questions

How do you conjugate 철저하다 in Korean?

철저하다 (to be thorough, exhaustive) is 철저해요 in the polite 해요체, 철저합니다 in formal 합니다체, 철저해 in casual 반말 and 철저하다 in the plain written style. The past is 철저했어요.

What is the past tense of 철저하다?

철저했어요 in everyday polite speech, 철저했습니다 formally. It is built from the 아/어 form 철저하여 plus ㅆ, which is why an irregular stem shows its irregularity here.

Is 철저하다 irregular?

Yes — it is 여 irregular (여 불규칙). 하다 and every verb built on it: 하다 → 하여 → 해요. That is why the stem looks different in 철저하여 and 철저하니 but unchanged in 철저합니다.

What TOPIK level is 철저하다?

5급 — TOPIK 5, advanced.

Dictionary form, meaning, sentence patterns, examples and audio from the 국립국어원 한국어기초사전, used under CC BY-SA 2.0 KR.

Conjugations are generated by this site's own engine and checked against the 9,380 forms the dictionary publishes on every build.